External and internal validity in clinical trials

BMJ (Online)

Volumn 344, Issue 7844, 2012, Pages 48-

  Sedgwick, Philip ^a  

^a ST GEORGE'S UNIVERSITY OF LONDON   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

PLACEBO; PROBIOTIC AGENT;

AGE DISTRIBUTION; ANTIBIOTIC THERAPY; CLINICAL TRIAL (TOPIC); DIARRHEA; DISEASE ASSOCIATION; DRUG EFFICACY; EXTERNAL VALIDITY; HUMAN; INTERNAL VALIDITY; LACTOBACILLUS; NOTE; POPULATION RESEARCH; PRIORITY JOURNAL; RANDOMIZATION; RANDOMIZED CONTROLLED TRIAL (TOPIC); SEX RATIO; TREATMENT DURATION; TREATMENT OUTCOME; TREATMENT RESPONSE;

EID: 84857202652     PISSN: 09598146     EISSN: 17561833     Source Type: Journal    
DOI: 10.1136/bmj.e1004     Document Type: Note

References (3)

1. Hickson M, D'Souza AL, Muthu N, Rogers TR, Want S, Rajkumar C, et al. Use of probiotic Lactobacillus preparation to prevent diarrhoea associated with antibiotics: randomised double blind placebo controlled trial. BMJ 2007;335:80.
2. Sedgwick P. Analysis by per protocol. BMJ 2011;342:d2330.
3. Sedgwick P. Analyses by intention to treat. BMJ 2011;342:d2212.